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June 2, 2011
Astronauts Carl E. Walz, left, and Jerome (Jay) Apt work on the Cartilage in Space experiment, a component of the Biotechnology System (BTS) aboard Spacehab, in the Space Shuttle Atlantis. The cartilage experiment investigated tissue formation and basic cell-to-cell interactions in a low-gravity, stationary-cell-culture environment. This photograph is one of fifteen 35mm frames (along with four 70mm frames) of still photography documenting the activities of NASA's STS-79 mission, which began with a September 16, 1996, liftoff from Launch Pad 39A the Kennedy Space Center (KSC) and ended with a landing at KSC on September 26, 1996. Onboard for the launch were astronauts William F. Readdy, commander; Terrence W. Wilcutt, pilot; John E. Blaha, Thomas D. Akers, Apt and Walz, all mission specialists. On flight day 4, the crew docked with Russia's Mir Space Station. Shannon W. Lucid, who had spent six months aboard Mir, switched cosmonaut guest researcher roles with Blaha. The latter joined fellow Mir-22 crew members Valery G. Korzun, commander, and Aleksandr Y. Kaleri, flight engineer.

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